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    • 8. 发明申请
    • CATALYST NANOPARTICLE
    • 催化剂纳米颗粒
    • US20070026294A1
    • 2007-02-01
    • US11531632
    • 2006-09-13
    • Yuzuru ShimazakiYoshio KobayashiMikio Konno
    • Yuzuru ShimazakiYoshio KobayashiMikio Konno
    • H01M4/92B01J23/44H01M4/88
    • H01M4/92B01J21/08B01J23/42B01J23/462B22F1/0018B22F1/02B22F2998/10B82Y30/00H01M4/8657H01M4/926H01M8/1007Y10S977/773Y10S977/775Y10S977/81Y10S977/811Y10T428/2991B22F9/24
    • Although nanoparticles capable of providing an extremely large active surface area have highly marked advantages, when a PEFC electrode utilizing nanoparticles is used for a prolonged period of time, the catalyst nanoparticles on carrier of the PEFC electrode because of the nano-size thereof migrate and aggregate together to result in a rapid loss of activity. Thus, there is a demand for inhibition of the above aggregation so as to prevent any drop of catalytic activity. According to the present invention the aggregation of nanoparticles can be inhibited by catalyst nanoparticles containing Pt wherein a porous matter containing an inorganic oxide is disposed on the surface of the catalyst nanoparticles. When use is made of nanoparticles whose surface has undergone specific modification, excellent activity can be realized. Therefore, there are provided surface-modified nanoparticles and catalyst and further a PEFC electrode utilizing these nanoparticles.
    • 虽然能够提供非常大的活性表面积的纳米颗粒具有非常显着的优点,但是当使用长时间使用纳米颗粒的PEFC电极时,由于其纳米尺寸迁移和聚集,所以PEFC电极载体上的催化剂纳米颗粒迁移和聚集 一起导致活动快速丧失。 因此,需要抑制上述聚集,以防止任何催化活性下降。 根据本发明,可以通过含有Pt的催化剂纳米颗粒来抑制纳米颗粒的聚集,其中在催化剂纳米颗粒的表面上设置含有无机氧化物的多孔物质。 当使用表面经过特殊改性的纳米颗粒时,可以实现极好的活性。 因此,提供了表面改性的纳米颗粒和催化剂,并且还提供了利用这些纳米颗粒的PEFC电极。